45 lines
1.1 KiB
PHP
45 lines
1.1 KiB
PHP
<?php
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namespace App\Support;
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use Illuminate\Support\Str;
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class Ip
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{
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public static function inNetwork(string $ip, string $network): bool
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{
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if (Str::contains($network, '/')) {
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[$subnet, $mask] = explode('/', $network);
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$subnet = inet_pton($subnet);
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$ip = inet_pton($ip);
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$mask = (int) $mask;
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$maskBytes = (int) floor($mask / 8);
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$maskBits = $mask % 8;
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if ($maskBytes > 0) {
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$subnetBytes = substr($subnet, 0, $maskBytes);
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$ipBytes = substr($ip, 0, $maskBytes);
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if ($subnetBytes !== $ipBytes) {
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return false;
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}
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}
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if ($maskBits > 0) {
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$maskValue = chr(pow(2, $maskBits) - 1);
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$subnetByte = ord($subnet[$maskBytes]);
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$ipByte = ord($ip[$maskBytes]);
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if (($subnetByte & $maskValue) !== ($ipByte & $maskValue)) {
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return false;
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}
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}
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return true;
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}
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return $ip === $network;
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}
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}
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